Tool for applying staybolt-sleeves to boilers



F. K. LANDGRAF.

TOOL FOR APPLYING ASTYBOLT SLEEVES T0 BOILERS.

APPLICATION FILED MAY 3, 1 .920.

Patented Dec. 27, 1921.

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FREDERICK K. LANDGRAF, F PTTSBURGH, PENNSYLVANIA, ASSIGNOR TO FLANNERY BOLT COMPANY, 0F PITTSBURGH, PENNSYLVANIA.

TOOL FOR APPLYNG- STAYBLT-SLEEVES TO .BOILERS Speciiicaton of Letters Patent.v

Patented Dee. 27, 1921.

Application filed May 3, 1920. Serial No. 378,531.

To all whom it may concern.'-

Be it known that l, FREDERICK K. LAND- GRAF, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Tools for Applying Staybolt- Sleeves to Boilers; and l do hereby declare the following to be a full, clear, and-exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in a tool for applying stay bolt sleeves to boilers.

In my Patent No. 1,352,285 granted Sept. 7th, 1920, l have claimed broadly the method of applying and securing stay bolt sleeves to the outer sheet by passing a rod or its equivalent through the sleeve and both sheets and carrying means for holding the sleeve while it is being welded to the sheet, and this application is designed as an improvement on the means for applying and holding the sleeve securely in place while welding or otherwise securing it in place.

ln assembling the parts the sleeve should be placed with its long axis parallel with the long axis of the bolt that is to be seated therein so that the latter will have equal clearance all around at the inner end of the sleeve and in the reamed part of the hole in the outer sheet, but it is an extremely diflicult operation to so seat the sleeve and hold it while welding it to the sheet and the object of my invention is to overcome this difculty and render the correct assemblage of the sleeve to the outer sheet comparatively easy, and with the positive assurance that the sleeve will be in the proper relative position to the bolt when the latter is applied.

In the accompanying drawings; Figure 1 shows the outer sheety punched or drilled;

Fig. 2 shows it reamed and recessed and the roaming and recessing tool in place; F ig. 3 shows the sleeve held in place during the welding; Fig. 4 shows the bolt applied; Fig. 5 shows the cap in place and Fig. 6 a view in elevation of the completed installation.

In applying the bolts, the outer sheet is punched or drilled as at 10 at the proper points for the bolts, and the inner sheet 11 has a threaded hole 12 for each bolt. After the Yholes in the outer sheet have been. punched Vor drilled they are reamed and recessed by a tool 13 such as is shown in Fig. 2, having a lsmooth cylindrical stem 14 adapted to pass through the openings in both sheets and this .stem carries the reammg and recessing tool 13 and holds it in proper position with relation' to the hole 10 in the outer sheet, so that when finished the recess will properly support the stay bolt sleeve 30 with its long axis parallel to the long yaxis of the bolt 31 to be inserted in the sleeve. After the hole has been reamed and recessed by a tool 13 having the same external dimension and curvature as the inner end of the sleeve 30, the latter is applied, centered and held in proper position by my improved apparatus which isshown in longitudinal section in Fig. 3. The apparatus comprises a bar 16 of a length sufficent to pass through both sheets of the boiler andprovided at its inner end with the extension 17 preferably made of steel and tapered and threaded so las to engage a tapped hole 12 of any sizewithin the limits of its extreme diameters, and it is preferably hardened to enable it to firmly engage -with the walls of a hole which for any reason may not be tapped. At theopposite end of the bar 16 is allixed a knurled knob 1S by which the bar may be turned to secure it in and remove it from its position in the sheets. Y

Mounted to slide longitudinally on the bar 16 is the centralizer or holding tool 19.V This tool is in the form of a truncated cone with an opening through the same for the passage of the bar 16, the opening at the lower end being of a size to closely embrace the bar 16 but permit of free sliding movements thereon and it is counterbored as shown above said lower end to receive the parts to be hereinafter described, the exterior contour of the centralizer19 being such that it will thinible adjacent the lower end of the latter Y and is adapted to engage the annu ar shoulder 22 in the bore oi the centraliser, there being sutrient space between the lower end of the ring and the annular shoulder 23 in the centralizer to perinit ci the necessary movement of the thirnble within the centralizer. rllhev thiinble 2O is yieldingly held in its highest position or the position shown in Fig. 3, by 'the coiled spring 23 located w1thin the centralizer and bearing at one end against the annu'rar shoulder 2a and .at its other end against the bottoni of the thirnble. rl`he thiinble is hollow and is provided at its lower end with an opening for theiiree passage ot the bar lo, and the lower portion ot its bore is provided with inclined or tapering,` wall 25 to engaged by the hardened steel balls 25 carried in open pockets in the lower end of the sleeve 27. There are preterably three ot such balls 23 equally spaced around the circumference oi the sleeve and seated in open pecl ets torined in the lower enlarged end of said sleeve so that the balls Vrnay bear against the inner inclined tace ot' the thirnble and the outer cylindrical 'tace of the bar ld. The upper end of the thineble 2O is closed by the cap 28 secured by screws to the outwardly projecting rianne ot the thinible, and thecap is provided with opening,` for the passage and :tree rnoveinent oif the sleeve 2 which as betere explained is mounted on the l@ with its lower end within the thirnble, and is yieldingly held in its lowest position within the thinible by the spring 29 which einbraces the .sleeve and bears one end against the cap 28 and at its other end against the shoulder formed by the enlargement of the lower end of the sleeve.

ln the operation ot the tool, the stay bolt sleeve 8O is passed over the end l? of the bar, and the otter is then passed through both sheets ol the boiler and secured to the inner sheet as shown in Fig. 8, att-er which the stay bolt sleeve is inoved on the bar until it is iirnily and properly seated against the outer sheet. fitter the sleeve has been seated the centra iaer is inoved down on the bar (by pressing` down on the cap 28) into the sleeve 30 and operates to hold the latter solidly in position. The centralizer and its attached parts are iiee to be moved downwardly on the bar, hut are prevented trono. naleving' in the opposite direction by the trio tional contact el the balls 28 with the bar 16 'nclined wall ot the thiinble, and by the sp.. .ng's 23 and 29. the atter of which by the clutch action ot the balls 26 prevents outward or upward movement of the thiinb`e 20 and the latter yieldinnfly holds the centraliZer against the sleeve 30.' lt will therefore be seen that when the parts are thus vapplied the centralizer yieldinglylholds the sleeve 30 soidly toits seat in the outer sheet but is capable or" being moved so as to properly adjust the latter and when the latter has been adjusted with relation to the outer sheet it will be so held against the possibility ot accidental displacement. After the sleeve 30 has been secured to the sheet by welding or otherwise a slight turn of the bar i6 reeases the threaded end 17 thereof from the inner sheet, and permits the tool to be withdrawn. To move the centralizer and its attached parts along thebar 16 toward the knob 18, the exposed end olf the sleeve 27 which is lrnurled to prevent slipping, is pulled upwardly or toward the knob which releases the clutch action ol't the balls 26 and permits centraliser and its attached parts to rbe inoved toward the knob 18. lll ith this arrangement the bar lo can be of suflicient length to provide `lorv varying distanccsbetween the two sheets and it will be apparent that when the tool. is applied to the boiler sheets the sleeve 30 will be positioned and held with its long axis parallel with the long` axis ot the bar i6 and also with the bolt 3l to be inserted in the sleeve 3() after the latter has been secured te the sheet. After Vthe completion ol the weldingor other operation by which the sleeve 30 is secured to the outer sheet, the tool is removed and the bolt 3lv applied and secured as shown in Figs. 5 and 6. The sleeve is closed by a cap 32, which with the gasket 33 on which the cap bears lo 1ins a steam tight sleeve joint.

By the use ot the tool above described there is no uncertainty whatsoever as to the correct position of the sleeve 30 as the latter automatically seats itself lin 'the recess in the outer sheet and is so held until fully se cured to the latter.

Having iully described iny invention what l claim as new and desire to secure by liettersddatent is l. ln a tool for applying stay bolt sleeves to boiler sheets and holding` the sleeves while they are welded or otherwise to the outer sheet, the combination of a bar adapted to pass through two sheets ofy a boiler, a centralizer mounted to slide on said bar and adapted to engage the' stay bolt sleeve, and rneans within'the centraliser Jfor locking` the latter at any point on the bar.

2. ln a tool 'lor apnlyingstay bolt sleeves to boiler sheets and for holding` the sleeves weile they are being welded or otherwise secured to the outer sheet, the combination oit a bar adapted to pass through two sheets or" a boiler, a centraliser mounted to slide on said bar and achiptedV to engage'the stay bolt sleeve and friction ineans within the centralizer 'for locking` the latter against out-l ward displacement. Y

ln a tool for applying stay bolt sleeves to boiler'sheets and holding` the sleeves while thev are being welded or otherwise secured to the outer sheet, the combination ot a' bar secured gage the vinner sheet, a centralizer mounted' `to slide on the said bar, friction loclrino' device carried bv said centralizer and a spring interposed between said friction locking` device and the centralizer.

5. The combination of a bar adapted to be passed through a hole in the outer sheet of a boiler and be fastened to the inner sheet, means slidably mounted on said bar to engage and temporarily hold a stay bolt sleeve in position on the outer sheet, andv means for locking said holding means in place.

6. rlhe combination of a bar adapted to be passed through a hole in the outer sheet ot a boiler and be locked to the inner sheet, means mounted to slide on said bar and engage a stay bolt sleeve resting on the outer sheet and :friction means carried by said engaging means for locking the latter against accidental outward movement.

7. rEhe combination of a bar adapted to be passed through a hole in the outer sheet of a boiler and engage the inner sheet, means mounted to slide on said bar and engage a stay bolt sleeve resting von the outer sheet, means for locking said engaging means to the bar and spring interposed between said locking means and engaging means for yieldingly holding the latter in Contact with said sleeve.

8. rEhe combination of a bar adapted to be passed through a hole in the outer sheet of a boiler and engage the inner sheet, means mounted to slide on said bar and engage a stay bolt sleeve resting on the outer sheet, means carried by said engaging means for locking the latter in place and a spring in-y terposed between said engaging means and locking means whereby the former will be yieldingly held against the sleeve.

9. The combination of anbar having a tagered threaded end, a stay bolt sleeve hold! ing device mounted to slide on said bar and means for locking the latter in place.

l0. rllhe combination of a bar having a tapered threaded end, a stay bolt sleeve holding device mounted to slide on said bar, a thimble carried by said holding device, means for locking the thimble against outward movement and a spring interposed between the thimble and holdingdevice and :tor-ming a yieldino backing for the latter.

ll. The combination of a bar having a tapered threaded end, a stay bolt sleeve holding device mounted to slide on said bar, a thimble carried by said holding device, friction means for locking the thimble against outward movemnet and a spring interposed between the thimble and holding device and forming a yielding backing for the latter.

l2. rlthe combination of a bar having a tapered threaded end, a stay bolt sleeve holding device mounted to slide on said bar, a thimble carried by said holding device, a spring interposed between said thimble and holdin@` device and friction means for preventing accidental outward movement of said thimble.

18. rlhe combination of a bar having a tapered threaded end, a stay boltl sleeve holding device mounted on said bar, a thimble carried by said holding device, a

spring interposed between the thimble and holding device and spring actuated sleeve carried by the thimble and provided with friction means adapted to engage the outer surface of the bar for locking the thimble against outward movement.

ld. The combination of a bar having a tapered threaded end, a stay bolt sleeve holding device mounted to slide on said bar, a thimble carried bv said holding device, a sprinQa interposed between the thimble and holding device, the inner face of the thimble being inclined, and a spring pressed sleeve within the thimble and carryingV friction balls adapted to engage the outer face of the bar and the inner inclined face of the thimble for temporarilv locking the latter against outward displacement.

ln testimony whereof, l have signed this specification in the presence of two subscribing witnesses.

FREDERCK K. LANDGRAF. Witnesses il. M. SCHADEL, R. B. Rn'rznn. V 

